Flowserve PRS 9 User Manual

PRS 9

Installation Instructions 810407- 00

Cycling Timer PRS 9

A Siebe Group Product

1

Dimensions/Parts Drawings

1 28.5

Fig. 1

169

A

B C D

E

30.01 (6TE)

I

H

G
F

J

2

Fig. 2

MAX 70°C

MAX 95%

Key

A

Switch S1

B

Switch S2 PROGRAM SELECTION

C

Relay 2 ENERGIZED

D

Relay 1 DE-ENERGIZED

E

32 way Euro card connector

F

LED

G

Pushbutton TEST

H

LED VALVE CLOSED

I

LED VALVE OPEN

J

Fixing screws

TIME DELAY

OPERATION

3

Contents

Page

Important Notes

Safety note ...................................................................................................................... 6

Warning ...........................................................................................................................6

Explanatory Notes

Scope of supply .............................................................................................................. 7

System description ......................................................................................................... 7

Function .......................................................................................................................... 7

Design ............................................................................................................................. 7

Technical data ................................................................................................................. 8

Installation

Design “c”/ “d” .................................................................................................................9

Attention..........................................................................................................................9

Tools ................................................................................................................................9

Wiring

Design “c”/ “d” ...............................................................................................................10

Wiring diagram ..............................................................................................................10

Key to wiring diagram ...................................................................................................10

Attention........................................................................................................................ 1 1

Note ..............................................................................................................................11

Basic Adjustments

Select opening mode of the valve ................................................................................ 12

Table 1 Opening mode of the valve ..............................................................................12

Adjust time delay ..........................................................................................................12

Table 2 Time delay........................................................................................................12

Commissioning

Warning .........................................................................................................................13

Check valve function .....................................................................................................13

Check wiring .................................................................................................................13

Apply mains voltage......................................................................................................13

Check test function .......................................................................................................13

Check switching function ..............................................................................................13

4

Contents – continued –

Page

Annex

Warning.........................................................................................................................14

Fault finding list .............................................................................................................14

Declaration of conformity ..............................................................................................14

5

Important Notes

Safety note

Use the cycling timer PRS 9 only in combination with GESTRA level switches
NRS 2-4. Installation must only be performed by qualified staff.

Qualified staff are those persons who – through adequate training in electrical
engineering, the use and application of safety equipment in accordance with
regulations concerning electrical safety systems, and first aid & accident
prevention – have achieved a recognised level of competence appropriate
to the installation and commissioning of this critical safety device.

Warning

The terminal strip of the PRS 9 is live during operation. This presents the
danger of electric shock. Cut off power supply before opening the
equipment and before inserting or removing the 19" slide-in unit.

6

Explanatory Notes

Scope of supply
PRS 9, design “c”

1 Cycling timer type PRS 9
2 Guide rails
1 32pole screw-type connector
1 Installation instructions

PRS 9, design “d”

1 Cycling timer type PRS 9
1 Installation instructions

System description

The PRS 9 is an analogue/digital cycling timer. In combination with up to four level
switches type NRS 2-4/NRS 2-5 and a position-controlled limit switch the cycling
timer can, as part of a controlled draining system in a power station, control drain
valves as a function of time.

Function

Signals coming to the inputs of the level switches and the position-controlled limit
switch will be processed electronically, with the time delay adjusted in the equipment
being taken into account. Dependent on the adjustment the drain valve will be
controlled in one or two steps with a time delay.

Design
Design “c”

19" slide-in unit with guide rails and 32pole screw-type connector for installation in
19" magazine acc. to DIN 41494, part 5.

Design “d”

19" spare slide-in unit

7

Technical data
Supply voltage

24 V DC

Power consumption

4 V A

Input

Three control inputs (volt-free relay contacts)
Control voltage 12 V DC

Output

2 volt-free relay contacts
Max. contact rating with a switching voltage of 24 V, 115 V and 230 V AC: 4 A
resistive, 0.75 A inductive at cos ϕ 0.5.
Max. contact rating with a switching voltage of 24 V DC: 4 A.
Service life of the relays: 30x10

6

switching cycles.

Indicators and adjustors

1 green LED

OPERATION, 1 red LED VALVE OPEN, 1 red LED VALVE CLOSED

1 pushbutton TEST (simulating alarm signalled by P1)
1 switch (on the circuit board) for program selection
1 switch (on the circuit board) for time delay setting

Protection

IP 10 to DIN 40050

Admissible ambient temperature

0°C to +70°C

Case

19" slide-in unit with front panel to DIN 41494 part 5 and rear 32 way Euro card
connector to DIN 41612 for installation onto 19" magazine.
Front panel: Aluminium

Wiring

via 32 pole screw-type connector at the back of the 19" magazine, max. conductor
size 1.5 mm

2

Weight

approx. 0.6 kg

8

Installation

Design “c”/“d”

1. Install the guide rails and the screw-type connector in the 19" magazine.

2. Introduce the 19" slide-in unit onto the guide rails until it hits the stop.

3. Tighten the fixing screws .

Attention

To provide sufficient ventilation, ensure a minimum spacing of 20 mm
between adjacent units.

Tools

■

Screwdriver for slotted screws, size 5, completely insulated according to VDE 0680.

J

9

Wiring

Design “c”/ “d”

Wiring is effected via the 32 pole screw-type connector.

Wiring diagram

PRS 9

4

5

1

Fig. 3

Key to wiring diagram

1

P2 Level switch NRS 2-4 or NRS 2-5 (24 V DC) from corresponding level electrode 2

2

Position-controlled limit switch of the drain valve

3

P1 Level switch NRS 2-4 or NRS 2-5 (24 V DC) from level electrode 1

4

Rel 2 for opening the drain valve

5

Rel 1 for closing the drain valve

10

2 3

Attention

■

Fuse supply cable with T 2.5 mA.

■

When switching off inductive loads, voltage spikes are produced
that may impair the operation of control and measuring systems.
Inductive loads should be provided with commercial arc suppressor
RC combinations, e. g. 0.1 µF/100 Ω.

Note

Connect only volt-free relay contacts to the control inputs. The cycling
timer PRS 9 supplies a 12 V DC control voltage.

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Basic Adjustments

Select opening mode of the valve

Use switch S2 for selecting the opening mode, see table 1.

B

Table 1 Opening mode of the valve

Switch position Opening mode of the valve

1 Two-step opening of the valve
2 One-step opening of the valve

Adjust time delay

Use switch S1 for setting the time delay, see table 2.

A

Table 2 Time delay

Switch position Time delay

1 5 sec.
2 7.5 sec.
3 10 sec.
4 15 sec.
5 22.5 sec.
6 30 sec.

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Commissioning

Warning

The terminal strip of the PRS 9 is live during operation. This presents the
danger of electric shock. Cut off power supply before undertaking any work
at the equipment and before inserting or removing the 19" slide-in unit.

Check valve function

1. Drive drain valve manually into the mid-position.

2. Apply mains voltage for about 10 sec. – P1 and P2 must not give a signal – and
check whether the valve moves into the closed position.

Check wiring

1. Check whether the 19" slide-in unit has been properly introduced into the magazine.

2. Check whether the equipment has been wired in conformity with the mains voltage.

Apply mains voltage

1. Switch on the mains voltage and check the equipment for power supply.
The LED functions as visual check.

F

Check test function

1. Push button and check whether the valve is opening.

2. Press and hold down button until the valve has reached the position of the limit

G

G

switch and the actuator has been switched off.

3. Release button and check whether the valve returns to the closed position

G

after the preset time delay has elapsed.

Check switching function

To check the switching functions raise or lower the water level until the switchpoints
are reached or simulate the corresponding signals by disconnecting the control inputs

3

of P1 and P2 , Fig. 3

1. P1 and P2 are not giving signals: Check whether LED is illuminated, REL1 is

1

H D

energized and the valve is closing.

2. P1 or P2 is giving a signal: Check whether the LED is illuminated, REL2 is

I C

energized and the valve is opening.

3. P2 or – if the valve is controlled only by P1 – P1 is not giving a signal or the valve is
in the intermediate position, no LED illuminated: Check whether the LED lights
up after the time delay, REL 1 is energized and the valve is closing.

D

H

13

Annex

Warning

The terminal strip of the PRS 9 is live during operation. This presents the
danger of electric shock. Cut off power supply before opening the
equipment and before inserting or removing the 19" slide-in unit.

Fault finding list

The LED is not illuminated after applying the mains voltage

F

Fault: The mains voltage has not been switched on.
Remedy: Switch on the mains voltage. Check the 19" slide-in unit for correct installation.

No or incorrect functions

Fault: The internal circuitry is defective.
Remedy: Replace the cycling timer.

Declaration of conformity

We hereby declare that the equipment PRS 9 conforms to the following European
guidelines:

■

LV guideline 73/23/EWG version 93/68/EWG

■

EMC guideline 89/336/EWG version 93/68/EWG

which are based on the following harmonised standards:

■

LV standard EN 60947-5-1: 1991

■

EMC standard EN 50 081-2, EN 50 082-2

This declaration is no longer valid if modifications are made to the equipment without
consultation with us.

Bremen, 28th April 1997

GESTRA GmbH

Dr. Anno Krautwald

Dr. Christian P olitt

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A Unit of Flowserve Corporation

A Siebe Group Company

810407-00/199c · ©1997 GESTRA GmbH · Bremen · Printed in Germany

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